{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "process characterization", "manufacturing process", "engineering feature", "process parameter", "material"], "input": "Then , the mechanism was validated through experiments with different welding parameters and positions ."}
{"concept or principle": ["mechanism", "parameters"], "process characterization": [], "manufacturing process": ["welding"], "engineering feature": [], "process parameter": [], "material": []}